Cyber thieves on Thursday began blasting out millions of e-mails impersonating NACHA - The Electronic Payments Association, a not-for-profit group that develops operating rules for organizations that handle electronic payments, from payroll direct deposits to online bill pay services. The missives in this latest scam arrive with various subject lines, but all complain about an unauthorized, rejected or failed ACH transaction. Most regular Internet users probably will ignore this message, as few people probably even know what ACH stands for (ACH, or "automated clearing house" refers to the electronic network used by banks to process credit and debit transactions in batches). That's likely just fine with the attackers, who appear to be targeting bookkeepers at small to mid-sized companies -- people who actually recognize what a failed or rejected ACH transaction can mean for their business's bottom line and reputation. According to an alert at the real NACHA Web

A year ago today, the Internet community witnessed a remarkable event: The unplugging of McColo, a Web hosting facility in Northern California that for a long time controlled a majority of the spam-sending operations on the planet. McColo's two main Internet providers abruptly yanked the cord after Security Fix presented them with scads of evidence collected by security researchers tying massive amounts of spam and other illicit activity to McColo's network. The outcome, of course, is now well known: The volume of spam sent worldwide tanked overnight, and remained at diminished levels for many weeks. All sorts of other badness diminished as well (more on that later). But since then, the sizable chunk of virtual real estate previously occupied by McColo has remained eerily quiet. A review of more than 3,000 Internet addresses previously assigned to the hosting firm reveals an Internet ghost town, as if the entire neighborhood had

Eight men have been indicted on charges that they hacked into credit card processing firm RBS Worldpay, and helped steal more than $9 million in a highly coordinated heist nearly a year ago, the U.S. Justice Department said Tuesday. The 16-count indictment, which names individuals from Estonia, Moldova and Russia, is the first major break in a case federal investigators are calling "perhaps the most sophisticated and organized computer fraud attack ever conducted." "Today, almost exactly one year later, the leaders of this attack have been charged," said Sally Quillian Yates, acting U.S. attorney of the Northern District of Georgia, in a written statement. "This investigation has broken the back of one of the most sophisticated computer hacking rings in the world." The men are accused of cracking the data encryption that RBS WorldPay used to protect customer data on payroll debit cards, allowing them to clone the cards. Some

A new spam campaign targeting MySpace.com users once again illustrates the blended threat from junk e-mail attacks, experts warn. This latest run tries to lure recipients into giving up their MySpace credentials, and then attempts to trick victims into installing password-stealing malicious software. Attackers began blasting out the junk e-mails early Monday, according to researchers at the University of Alabama, Birmingham, Researchers at the school so far have tracked more than 30 Web site names associated with this attack, each beginning with "accounts.myspace.com" and ending in a United Kingdom country code domain (.uk). The campaign is nearly identical to one launched late last month targeting Facebook.com users, said Gary Warner, director of research in computer forensics at UAB Birmingham: Recipients are directed to a fake Myspace.com page and asked for their login credentials. That attack cycled through at least 242 different look-alike Facebook scam sites before the last was